The VIPRE PC Rescue Program is a free command-line utility that can scan and help clean an infected computer. This is not a real-time scanner so it won't protect you from being infected in the first place.
These types of programs are great for trying to disinfect an infected computer, or just you give you a second opinion to make sure its not.
The VIPRE PC Rescue Program is a self-extracting executable file that contains the virus scanner and definitions. There is no pretty graphical interface that makes this program easy to use.
So to use this tool it helps to be familiar with the basic concepts of using other command-line based utilities. For more information, check out the web site.